CN102118306B - Method for redirecting multimedia content on demand request and redirection equipment - Google Patents
Method for redirecting multimedia content on demand request and redirection equipment Download PDFInfo
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Abstract
The invention discloses a method for redirecting a multimedia content on demand request in an internet protocol television (IPTV) system. The IPTV system adopts a tree structure with a plurality of nodes, wherein each node is provided with a plurality of access points (APs) and a plurality of streaming media servers; each AP is relevant to multimedia content types; and each multimedia content type corresponds to different content direction strategies. The method comprises the following steps: receiving a multimedia content on demand request from a user at one AP; according to the AP number, determining the multimedia content type related to the multimedia content on demand request; and according to the content direction strategy corresponding to the determined multimedia content type, redirecting the multimedia content on demand request to a proper streaming media server. In addition, the invention also discloses corresponding redirection equipment for redirecting the multimedia content on demand request.
Description
Technical field
The present invention relates to IPTV (IPTV) system, specifically, relate in the IPTV system multimedia content on demand request from the user is carried out to redirected technology.
Background technology
Current, the IPTV system has obtained commercial widely.IPTV is a kind of multimedia communication technology based on internet, and it utilizes the infrastructure of broadband network, take domestic television set or personal computer as display terminal, to the terminal use, provides television channel program and other content of multimedia.The main feature of IPTV is interactivity and real-time.
Traditional IPTV system is used centralized control agent (for example IPTV control centre), with the request based on the user, different services or content type are carried out to different strategies usually.Usually, the content transmission network of existing IPTV system comprises a centralized control centre and a plurality of Edge Server.Usually, when user's request arrives IPTV control centre, suitable content of multimedia that the user asks or the Edge Server of service of comprising selected by IPTV control centre, and request is directed to selected Edge Server, then, provide corresponding content of multimedia or service by this Edge Server.
Although this mode is successfully applied, but, centralized control for the ultra-large IPTV system that produces a large amount of concurrent requests (for example, the system that can hold millions of users) or the very many IPTV systems of Edge Server will become bottleneck, this be due to centralized control agent when selecting suitable Edge Server, need to know the load of content topology, Edge Server and the network of whole IPTV system, and, along with the expansion of system scale, collect and manage these information by individual equipment and will become more difficult.
In addition, " flat " structure of existing content transmission network also is not suitable for the large scale system that Edge Server distributes and disperses on geographical position, because in such system, delay in core network can cause centralized control centre to be difficult to know in time the renewal of Edge Server, thereby may make the decision made mistake.Equally, in the core network of mean quality and core network, interrupted network problem also can make the IPTV system unstable.
For addressing the above problem, some interchangeable technical schemes have been proposed at present.In these technical schemes, the server cluster with capacity of self-government can determine in inside whether to user's request, provide service or to other server cluster transmission request, and at the internal control content of multimedia.Yet such technical scheme does not relate to the different strategies of situation implement to(for) different services or content type.In addition, repeatedly be redirected and also may form winding.
Summary of the invention
The present invention proposes in view of above-mentioned technical problem just, its purpose is to provide a kind of method and re-positioning device thereof that is redirected multimedia content on demand request in the IPTV system, it can support to use different directional strategies for different content of multimedia or COS, and realizes multi-level being redirected and do not cause being redirected of circulation.
According to an aspect of the present invention, a kind of method that is redirected multimedia content on demand request in the IPTV system is provided, described IPTV system adopts the tree structure with a plurality of nodes, wherein, each node has a plurality of access points and a plurality of streaming media server, each access point is associated with multimedia content type, and content-targeted strategy corresponding to each multimedia content type, and described method comprises: from access point, receive the multimedia content on demand request from the user; According to the access point number, determine the multimedia content type that described multimedia content on demand request is related; And, according to the content-targeted strategy corresponding with determined multimedia content type, described multimedia content on demand request is redirected to suitable streaming media server.
According to another aspect of the present invention, a kind of re-positioning device that is redirected multimedia content on demand request in the IPTV system is provided, it is configured on the node of described IPTV system, described re-positioning device comprises: a plurality of access points, for the receiving multimedia content order request, wherein each access point is associated with multimedia content type, and content-targeted strategy corresponding to each multimedia content type; Content type is determined device, for according to the access point number, determines the multimedia content type that described multimedia content on demand request is related; And redirection device, the content-targeted strategy for according to corresponding with determined multimedia content type, be redirected to suitable streaming media server by described multimedia content on demand request.
According to a further aspect of the invention, provide a kind of server for the IPTV system, it comprises above-mentioned re-positioning device.
The accompanying drawing explanation
Fig. 1 is the flow chart that is redirected the method for multimedia content on demand request in the IPTV system according to an embodiment of the invention;
Fig. 2 is the flow chart of redirection steps in the embodiment shown in Fig. 1;
Fig. 3 is the flow chart of determining step in the embodiment shown in Fig. 2;
Fig. 4 is the schematic diagram of an example of IPTV system of the method for the embodiment shown in application drawing 1 to Fig. 3;
Fig. 5 is the schematic diagram of another example of IPTV system of the method for the embodiment shown in application drawing 1 to Fig. 3;
Fig. 6 is the schematic block diagram that is redirected the re-positioning device of multimedia content on demand request in the IPTV system according to an embodiment of the invention.
Embodiment
Believe that above and other objects of the present invention, feature and advantage will be more obvious by the detailed description to specific embodiments of the invention below in conjunction with accompanying drawing.
Fig. 1 shows the flow chart that is redirected the method for multimedia content on demand request in the IPTV system according to an embodiment of the invention.Below in conjunction with accompanying drawing, the present embodiment is described in detail.
In the present embodiment, the IPTV system adopts tree structure, comprises a plurality of nodes, i.e. a Centroid and a plurality of fringe node.IPTV system for ultra-large, also can comprise a plurality of branch nodes, and it is between Centroid and fringe node.In the IPTV system, each node can comprise a plurality of access points and a plurality of streaming media server, wherein streaming media server is for providing content of multimedia or service to the user, and access point is for receiving the multimedia content on demand request from the user, and each access point is associated with a multimedia content type, the content-targeted strategy that each multimedia content type can be corresponding different.Preferably, access point is the IP port.
For example, node can have four IP ports, and wherein, IP port A is associated with family movie, and IP port B is associated with trailer, and IP port C is associated with up-to-date program recording, and IP port D is associated with other multimedia content type.So, corresponding content-targeted strategy can be as described below:
While 1) for multimedia content type, being family movie, content-targeted strategy can be: from zone, nearest available server provides the service of family movie, if nearest server is unavailable, provides other alternative film;
While 2) for multimedia content type, being trailer, content-targeted strategy can be: the service of trailer only is provided from the designated edge server that comprises trailer, if the designated edge server is unavailable, refuses this request;
While 3) for multimedia content type, being up-to-date program recording, content-targeted strategy can be: from zone, nearest available server provides the service of up-to-date program recording, if server nearest in this zone is unavailable, from adjacent zone, nearest available server provides;
4) for other multimedia content type, content-targeted strategy can be: the available server from zone provides corresponding content of multimedia.
Although more than provided the example of the content-targeted strategy of some multimedia content type and correspondence thereof, but those of ordinary skill in the art can understand, these examples are not determinate, multimedia content type and content-targeted strategy thereof can be as required, by service provider's self-defining of IPTV system.
As shown in Figure 1, at step S101, from the access point of for example IP port, receive the multimedia content on demand request from the user.By different IP ports, the node of IPTV system can receive different multimedia content on demand requests.Then, at step S105, according to the IP port numbers, determine the multimedia content type that multimedia content on demand request is related.As previously mentioned, the IP port is associated with multimedia content type, and this incidence relation can pre-determine and be recorded in the incidence relation table, wherein IP port numbers of each entry record and corresponding multimedia content type.
Then, at step S110, the content-targeted strategy according to corresponding with determined multimedia content type, be redirected to suitable streaming media server by multimedia content on demand request.As previously mentioned, different multimedia content type can adopt different content-targeted strategies, and this strategy can be in advance formulated by the service provider of IPTV system, and offers each node.In the present embodiment, multimedia content on demand request is redirected and can adopts the multi-level redirected method will be described later, certainly, those of ordinary skill in the art easily understands, and also can adopt existingly by centralized control agent, to carry out redirected method.In addition, in the present embodiment, the multimedia-on-demand content requests received for each IP port, all use multi-level redirected method, yet, those of ordinary skill in the art also easily expects, the multimedia-on-demand content requests can be only or a part of IP port received is used multi-level redirected method.
By above description, can find out, the method of the redirected multimedia content on demand request of the present embodiment can be supported different multimedia content type is used to different content-targeted strategies, by specific multimedia content type is adopted to specific content-targeted strategy, because only needing a small amount of systematic knowledge, each node just can make decision to the request with specific multimedia content type, therefore, can reduce the response time to request, improve user's experience.
Fig. 2 shows the flow chart of redirection steps S110 in the embodiment shown in Fig. 1, below in conjunction with accompanying drawing, this step is described in detail.
In the present embodiment, redirection steps S110 adopts multi-level redirected method, that is, each node also disposes rank directional strategy separately.According to the rank directional strategy of each node, can judge whether this node can be used for providing corresponding service to received multimedia content on demand request, and, being judged as this node when available, request is directed to this node.In addition, can also, when this node can not provide corresponding service, request be redirected to other node.
The rank directional strategy is the application-specific rule that is applied to node, can be defined as shown in table 1:
Table 1
| The rank directional strategy | Rule |
| First order strategy | Whether the node that checks this grade of strategy of application is whether load capacity movable and this node is over threshold value with position degree of closeness, this node between the user who sends multimedia content on demand request |
| Second level strategy | Check first order strategy and whether have asked content of multimedia in this node |
| Third level strategy | But check the load capacity of the streaming media server in second level strategy and this node |
Those of ordinary skill in the art can understand, and the rank directional strategy can be defined as required by the service provider of IPTV system, and it is not limited to the content of table 1.
As shown in Figure 2, at step S201, according to the source address of received multimedia content on demand request, be identified for the service-domain of this multimedia content on demand request.
In the present embodiment, service-domain is that the IP address field of service specifically is provided for node, for helping to determine the server nearest with the user who sends multimedia content on demand request.Each service-domain can comprise one or more nodes, has different priority between a plurality of nodes.Each node also can be served one or more service-domains.
Then, at step S205, the rank directional strategy of all nodes in the service-domain based on definite in step S201, judge in this service-domain the streaming server that whether has the node that the service that multimedia content on demand request asks can be provided.About this step, will with reference to Fig. 3, be elaborated in the back.
Have if be judged as in service-domain the streaming server that service can be provided in step S205, at step S210, multimedia content on demand request is redirected to this streaming server, by this streaming server response multimedia content on demand request, provides corresponding content of multimedia.
Do not have if be judged as in service-domain the streaming server that service can be provided in step S205, at step S215, check whether this service-domain has upper layer node.If upper layer node is arranged, at step S220, multimedia content on demand request is redirected to this upper layer node, select its included streaming server by upper layer node, the content of multimedia of being asked to provide, or determine the streaming server of the node that service can be provided from adjacent service-domain.If there is no upper layer node, at step S225, according to the content-targeted strategy of multimedia-on-demand content requests, carry out other processing, for example, provide other alternative content of multimedia, refusal request etc.
Fig. 3 shows the flow chart of determining step S205 in Fig. 2.As shown in Figure 3, at step S301, determine the quantity of service-domain interior nodes definite in step S201.
If service-domain only comprises a node, only comprise the receiving node of receiving multimedia content order request, at step S303, receiving node is directly determined the streaming media server that service can be provided in included streaming media server at it, now, the interior existence of service-domain that judgment result is that of determining step S205 can provide the streaming server of service.If receiving node be can not determine the streaming media server that service can be provided in step S303, there is not the streaming server that service can be provided in judgment result is that in service-domain of determining step S205.
If service-domain comprises a plurality of nodes, at step S305, determine whether receiving node is father node in service-domain, and whether receiving node has child node in service-domain.If receiving node is father node, at step S308, for the child node with limit priority of receiving node in service-domain, carries out the rank directional strategy of this child node, and, at step S310, judge whether this child node can be used for the service that provides required.If this child node can be used for providing service, at step S312, receiving node is redirected to this child node by multimedia content on demand request.Then, at step S315, this child node determines whether also to exist the sub-services territory for multimedia content on demand request.
If there is the sub-services territory, return to execution step S301 to step S315, wherein, using this sub-services territory as current service-domain, this child node is as current receiving node.
If there is no sub-services territory, at step S318, determine the streaming media server that service can be provided in this child node streaming media server included at it, now, the existence in service-domain of judgment result is that of determining step S205 can provide the streaming server of service.If this child node be can not determine the streaming media server that service can be provided in step S318, at step S320, this child node is redirected to receiving node by multimedia content on demand request, and now, this child node is judged as unavailable.
If in step S310 or in step S320, child node is judged as unavailable, judge whether this child node is last child node (step S322), if not last child node, turn back to step S308, according to the order of priority, for next child node in service-domain, perform step S308 to step S320; If last child node is judged as all child nodes all unavailable.
When all child nodes all are judged as when unavailable, at step S325, determine the streaming media server that service can be provided in the receiving node streaming media server included at it, now, the existence in service-domain of judgment result is that of determining step S205 can provide the streaming server of service.If receiving node be can not determine the streaming media server that service can be provided in step S325, when in service-domain, certain child node is as current receiving node, at step S328, multimedia content on demand request is redirected to the father node (being former receiving node) of this child node.Then, at step S330, determine the streaming media server that service can be provided in this father node streaming media server included at it, now, the existence in service-domain of judgment result is that of determining step S205 can provide the streaming server of service.If this father node be can not determine the streaming media server that service can be provided in step S330, there is not the streaming media server that service can be provided in judgment result is that in service-domain of determining step S205.In addition, when receiving node be can not determine the streaming media server that service can be provided in step S325, for current receiving node, be the situation of actual receiving node, be judged as in service-domain and do not have the streaming media server that service can be provided.
If in step S305, receiving node is not the father node in service-domain, in step S335, determine the streaming media server that service can be provided in the receiving node streaming media server included at it, now, the interior existence of service-domain that judgment result is that of determining step S205 can provide the streaming server of service.If receiving node be can not determine the streaming media server that service can be provided in step S335, in step S340, multimedia content on demand request is redirected to the upper layer node of receiving node, then turns back to step S305, wherein using this upper layer node as current receiving node.
By foregoing description, can find out, each node has the function of overall business load balance and interior business load balance, when whether decision node can be used for the service that provides asked or is redirected to other node, use overall business load balance, and use the interior business load balance when determining at intra-node when the streaming media server of service can be provided.
In addition, for fear of forming winding, each nodes records for example, through the multimedia content on demand request a period of time of oneself, 30 seconds.When each node receives multimedia content on demand request, at first check the current identical multimedia content on demand request whether recorded from same node of this node.Record identical multimedia content on demand request if be checked through, show to form circulation and be redirected, this node will be determined the streaming media server that service can be provided in the direct streaming media server included at it.If there is no identical multimedia content on demand request, this node is carried out step subsequently.In this way, can effectively avoid being redirected of circulation.
In the present embodiment, receiving node can be Centroid, branch node or the fringe node in the IPTV system.The method of embodiment shown in Fig. 1 to Fig. 3 is described below by two examples.
Fig. 4 is the schematic diagram of an example of IPTV system of the method for the embodiment shown in application drawing 1 to Fig. 3, and wherein, the IPTV system has tree height of three, comprises 1 Centroid, 2 branch nodes and 5 fringe nodes.In this example, mainly the left-hand branch network is described.
As shown in Figure 4, branch node 1 and fringe node 1,2 forms three service-domains: 201.0.0.0/16 service-domain (meaning with chain-dotted line), 201.1.0.0/16 service-domain (meaning with the length chain-dotted line) and default-service territory (dotting).201.0.0.0/16 service-domain is the request from the 201.0.0.0/16 address field for service, and comprise 3 nodes, be fringe node 1, fringe node 2 and branch node 1, wherein, the priority of each node is: fringe node 1>fringe node 2>branch node 1, and fringe node 1,2 and branch node 1 are all applied second level strategy.201.1.0.0/16 service-domain is the request from the 201.1.0.0/16 address field for service, and comprise 2 nodes, be fringe node 2 and branch node 1, wherein the priority of each node is: fringe node 2>branch node 1, and fringe node 2 and branch node 1 are all applied second level strategy.The default-service territory is the request from other address field for service, and comprises 1 node, and branch node 1, wherein branch node 1 application second level strategy.In fact, although not shown, for Centroid and branch node 1,2, also can form similar service-domain, for example, comprise the first service territory of Centroid and branch node 1, the second service territory that comprises Centroid and branch node 1,2, comprise the default-service territory of Centroid.
In this example, receiving node is Centroid.When the center node receives the multimedia content on demand request from the user by its IP port, according to this IP port numbers, for example IP port A, determine that multimedia content type is family movie.Then, Centroid, according to the content-targeted strategy for family movie, starts multimedia content on demand request is redirected.
At first, Centroid is according to the source IP address of multimedia content on demand request, and the service-domain that is identified for this request is the first service territory.In the first service territory, comprise 2 nodes, wherein, Centroid is father node, its child node is branch node 1.So, Centroid is carried out the rank directional strategy of branch node 1 to judge whether branch node 1 can be used for providing the service of being asked.According to second level strategy, Centroid checks whether branch node 1 and user's position degree of closeness, the health of branch node 1 (that is, branch node 1 whether be movable and whether load capacity branch node 1 surpasses threshold value) and branch node 1 exist asked content of multimedia.When branch node 1 meets above-mentioned inspection condition, the zone that is branch node 1 in approaching most the user and be healthy (being that branch node 1 is movable and its load capacity surpasses threshold value) and while having the content of multimedia of asking, Centroid judgement branch node 1 is available, and Centroid is redirected to branch node 1 by multimedia content on demand request.
The definite sub-services territory that do not exist of fringe node 1, in fringe node 1 streaming server included at it, determine which streaming server can provide required service, yet fringe node 1 finds that current all streaming servers all can not provide service, multimedia content on demand request is redirected to branch node 1 again, it is unavailable that branch node 1 is judged as fringe node 1 again.
Then, 1 pair of branch node has the fringe node 2 of inferior high priority and carries out its rank directional strategy (second level strategy), and because fringe node 2 does not have asked content of multimedia, branch node 1 judgement fringe node 2 is unavailable.Now, branch node 1 finds that all child nodes are all unavailable, in branch node 1 streaming server included at it, determine which streaming server can provide required service, after having determined the streaming server of service can be provided, multimedia content on demand request is redirected to this streaming server.This streaming server response multimedia content on demand request, provide corresponding service.
If now branch node 1 can not be determined the streaming server that service is provided, multimedia content on demand request is redirected to Centroid, determine that by Centroid its included streaming server is to provide service.
Fig. 5 shows another example of IPTV system of the method for the embodiment shown in application drawing 1 to Fig. 3, and wherein the IPTV system has the structure identical with Fig. 4.In this example, mainly the right-hand branch network is described.
As shown in Figure 5, branch node 2 and fringe node 3,4,5 also form three service-domains: 201.128.0.0/16 service-domain (meaning with the length chain-dotted line), 201.129.0.0/16 service-domain (meaning with chain-dotted line) and default-service territory (dotting).201.128.0.0/16 service-domain is the request from the 201.128.0.0/16 address field for service, and comprise 2 nodes, be fringe node 3 and branch node 2, wherein, the priority of each node is: fringe node 3>branch node 2, and fringe node 3 application second level strategies, branch node 2 application third level strategies.201.129.0.0/16 service-domain is the request from the 201.129.0.0/16 address field for service, and comprise 4 nodes, be fringe node 3,4,5 and branch node 2, wherein the priority of each node is: fringe node 5>fringe node 4>fringe node 3>branch node 2, and fringe node 4,5 and branch node 2 application third level strategies, fringe node 3 application second level strategies.The default-service territory is the request from other address field for service, and comprises 1 node, and branch node 2, wherein branch node 2 application third level strategies.In fact, although not shown, for Centroid and branch node 1,2, also can form similar service-domain, for example, comprise the first service territory of Centroid and branch node 1, the second service territory that comprises Centroid and branch node 1,2, comprise the default-service territory of Centroid.
In this example, receiving node is branch node 2.When branch node 2 receives the multimedia content on demand request from the user by its IP port, according to this IP port numbers, for example IP port D, determine that multimedia content type is other.Then, branch node 2, according to the content-targeted strategy for other multimedia content type, starts this multimedia content on demand request is redirected.
At first, branch node 2 is according to the source IP address of multimedia content on demand request, and the service-domain that is identified for this request is the 201.129.0.0/16 service-domain.In this service-domain, comprise 4 nodes, wherein, branch node 2 is father nodes, its child node is fringe node 3,4 and 5.So, the fringe node 5 that branch node 2 is the highest for priority is carried out its rank directional strategy to judge whether fringe node 5 can be used for providing the service of being asked.According to third level strategy, branch node 2 check fringe nodes 5 and user's position degree of closeness, the health of fringe node 5 (that is, fringe node 5 whether be movable and whether load capacity fringe node 5 surpasses threshold value) but, whether fringe node 5 exist the load capacity of each streaming media server in asked content of multimedia and fringe node 5.When fringe node 5 meets above-mentioned inspection condition, the zone that is fringe node 5 in approaching most the user and be healthy (being that fringe node 5 is movable and its load capacity surpasses threshold value) and have the content of multimedia of asking and certain streaming media server while thering is load capacity, branch node 2 judgement fringe nodes 5 are available, branch node 2 directly is redirected to multimedia content on demand request certain streaming media server of fringe node 5, by this streaming media server, responds multimedia content on demand request so that required service to be provided.
If it is unavailable that fringe node 5 is judged as, edge node 4,3 is judged successively, and the example of this process and Fig. 4 is similar, at this, omits corresponding explanation.
If receiving node is fringe node, with Centroid and branch node similarly, also can use the method for the embodiment shown in Fig. 1 to Fig. 3 to be redirected multimedia content on demand request.In this case, for example, receiving node is fringe node 4, after fringe node 4 receives multimedia content on demand request, determines that service-domain is the 201.129.0.0/16 service-domain.In this service-domain, fringe node 4 is not father node, therefore, determine the streaming server that service can be provided in the direct streaming server included at it of fringe node 4, yet fringe node 4 finds that it can not be identified for providing the streaming server of service, multimedia content on demand request is redirected to its upper layer node, branch node 2.Then branch node 2, in the 201.129.0.0/16 service-domain, carries out being redirected of multimedia content on demand request, and its process, with above-mentioned described identical with reference to Fig. 5, is omitted corresponding explanation at this.
Under same inventive concept, Fig. 6 is the schematic block diagram that is redirected the re-positioning device 600 of multimedia content on demand request in the IPTV system according to an embodiment of the invention.Below in conjunction with accompanying drawing, the re-positioning device 600 of the present embodiment is described in detail, the part identical with front embodiment wherein, suitably the description thereof will be omitted.
In the present embodiment, re-positioning device 600 can be configured on each node of IPTV system.
As shown in Figure 6, the re-positioning device 600 of the present embodiment comprises: a plurality of access points 601
1-601
n, by these access points, can receive the multimedia content on demand request from the user; Content type is determined device 602, and it determines according to the access point number the related multimedia content type of multimedia content on demand request received; And redirection device 603, it,, according to the content-targeted strategy corresponding with determined multimedia content type, is redirected to suitable streaming media server by multimedia content on demand request.
In the present embodiment, the node of IPTV system is via access point 601
1-601
nThe receiving multimedia content order request, access point 601
1-601
nIt can be the IP port.Each access point is associated with a multimedia content type, and content-targeted strategy corresponding to each multimedia content type.About access point, multimedia content type and content-targeted strategy thereof, in embodiment in front, describe in detail, repeat no more herein.
When from access point 601
1-601
nAfter receiving multimedia content on demand request, content type determines that device 602 can, according to the access point number, determine multimedia content type.As previously mentioned, the corresponding relation of access point number and multimedia content type can be pre-recorded in the incidence relation table, then by inquiry access point number, can obtain corresponding multimedia content type.
Then, redirection device 603, according to the content-targeted strategy corresponding with multimedia content type, is redirected to suitable streaming media server by multimedia content on demand request.Content-targeted strategy can be pre-determined by the service provider of IPTV system, and offers redirection device 603.
In the present embodiment, redirection device 603 will be realized being redirected of multimedia content on demand request by multi-level redirected mode.For this reason, each node of IPTV system configured to rank directional strategy separately.
In redirection device 603, service-domain determination module 6031 is according to the source address of multimedia content on demand request, be identified for the service-domain of this multimedia content on demand request, then, the rank directional strategy of judge module 6032 based on all nodes in determined service-domain, judge in this service-domain the streaming server that whether has the node that the service that multimedia content on demand request asks can be provided.Have such streaming server if judge module 6032 is judged as, redirection module 6033 is redirected to this streaming server by multimedia content on demand request.There do not is such streaming server if judge module 6032 is judged as, check that module 6034 checks whether this service-domain has upper layer node.When this service-domain has upper layer node, by redirection module 6033, multimedia content on demand request is redirected to this upper layer node.When service-domain does not have upper layer node, redirection device 603, according to content-targeted strategy, is carried out other processing.
In judge module 6032, the quantity determining unit is determined the quantity of all nodes in service-domain.While only having a node in service-domain, determine the streaming media server that service can be provided in the streaming media server determining unit streaming media server included at this node, now the judged result of judge module 6032 is to exist for the streaming media server of service is provided in service-domain, and offers redirection module 6033.If the streaming media server determining unit is not determined suitable streaming media server, in judge module 6032 output service-domains, there do not is the result of the streaming media server for service is provided.
If comprise a plurality of nodes in service-domain, determining unit determines whether the receiving node of receiving multimedia content order request is father node in service-domain.If father node, the strategy execution unit is for the child node of this receiving node in service-domain, according to the order of the priority of child node, carry out successively the rank directional strategy of each child node, and judge according to implementation status whether this child node can be used for the service that provides asked by judging unit.If judgment unit judges can be used for this child node, redirection module 6033 is redirected to this available child node by multimedia content on demand request.Then, at this, on available child node, multimedia content on demand request is redirected.If judgment unit judges is that this child node is unavailable, the strategy execution unit is to next child node executive level directional strategy, and judged by judging unit.
If receiving node is not father node, in the streaming media server determining unit streaming media server included at this receiving node, determines the streaming media server that service can be provided, and offer redirection module 6033.If the streaming media server determining unit be can not determine suitable streaming media server, by redirection module 6033, request is redirected to the upper layer node of receiving node, then in the redirection device of upper layer node, multimedia content on demand request is redirected.
Further, for avoiding circulation, be redirected, in judge module 6032, also comprise: record cell, its record for example, through multimedia content on demand request a period of time of this node, 30 seconds; And inspection unit, it checks and whether records the identical multimedia content on demand request from same node when receiving multimedia content on demand request.If find that there is identical multimedia content on demand request, show to form circulation and be redirected, by the streaming media server determining unit, directly determine suitable streaming media server.If there is no identical multimedia content on demand request, continue multimedia content on demand request is redirected.
The re-positioning device 600 that it should be pointed out that the present embodiment can be realized the method for the redirected multimedia content on demand request of the embodiment shown in Fig. 1 to Fig. 3 in operation.And the re-positioning device 600 of the present embodiment can be included in the server for the IPTV system.
Should be understood that, the re-positioning device of above-described embodiment and part thereof can be by such as very lagre scale integrated circuit (VLSIC) or gate array, realize such as the semiconductor of logic chip, transistor etc. or such as the hardware circuit of the programmable hardware device of field programmable gate array, programmable logic device etc., also can use the software of being carried out by various types of processors to realize, also can be realized by the combination of above-mentioned hardware circuit and software.
Describe method and the re-positioning device that is redirected multimedia content on demand request in the IPTV system of the present invention although above in detail by some exemplary embodiments, but above these embodiment are not exhaustive, those skilled in the art can realize variations and modifications within the spirit and scope of the present invention.Therefore, the present invention is not limited to these embodiment, and scope of the present invention is only defined by the appended claims.
Claims (12)
1. a method that is redirected multimedia content on demand request in IPTV IPTV system, described IPTV system adopts the tree structure with a plurality of nodes, wherein, each node has a plurality of access points and a plurality of streaming media server, each access point is associated with multimedia content type, and the content-targeted strategy that each multimedia content type is corresponding different, described method comprises:
Receive the multimedia content on demand request from the user from access point;
According to the access point number, determine the multimedia content type that described multimedia content on demand request is related; And
Content-targeted strategy according to corresponding with determined multimedia content type, be redirected to suitable streaming media server by described multimedia content on demand request;
Wherein, described being redirected is multi-level being redirected, wherein, each node is configured with rank directional strategy separately, and according to the rank directional strategy of each node, whether decision node can be used for providing service to described multimedia content on demand request, when being judged as this node when available, described multimedia content on demand request is directed to this node, when being judged as this node when unavailable, described multimedia content on demand request is redirected to other node.
2. method according to claim 1, wherein, the described step that described multimedia content on demand request is redirected to suitable streaming media server comprises:
According to the source address of described multimedia content on demand request, be identified for the service-domain of described multimedia content on demand request;
Rank directional strategy based on all nodes in described service-domain, judge in described service-domain the streaming server that whether has the node that the service that described multimedia content on demand request asks can be provided;
If have described streaming server in described service-domain, described multimedia content on demand request be redirected to described streaming server;
If there is not described streaming server in described service-domain, check whether described service-domain has upper layer node;
If described service-domain has upper layer node, described multimedia content on demand request is redirected to described upper layer node; And
If described service-domain does not have upper layer node,, according to described content-targeted strategy, carry out other processing.
3. method according to claim 2 wherein, describedly judges in described service-domain that the step of the streaming server that whether has the node that the service that described multimedia content on demand request asks can be provided comprises:
Determine the quantity of described service-domain interior nodes;
If described service-domain only comprises the receiving node that receives described multimedia content on demand request,
Determine the streaming media server that described service can be provided in the described receiving node streaming media server included at it;
If described receiving node be can not determine the streaming media server that described service can be provided, be judged as in described service-domain and do not have the streaming media server that described service can be provided;
If described service-domain comprises a plurality of nodes,
Determine whether described receiving node is father node in described service-domain;
If described receiving node is the father node in described service-domain,
For the child node with limit priority of described receiving node in described service-domain, carry out the rank directional strategy of described child node;
Judge whether described child node can be used for providing described service;
If described child node can be used,
Described multimedia content on demand request is redirected to described child node;
Described child node determines whether to exist the sub-services territory for described multimedia content on demand request;
If there is described sub-services territory, using described sub-services territory as current service-domain, using described child node as current receiving node, return to the step of the quantity of described definite node;
If there is no described sub-services territory,
Determine the streaming media server that described service can be provided in the described child node streaming media server included at it;
If described child node be can not determine the streaming media server that service can be provided, described multimedia content on demand request is redirected to described receiving node, described child node is judged as unavailable;
If described child node is unavailable, according to the order of priority, successively for other child node of described receiving node in described service-domain, return to the step of above-mentioned executive level directional strategy, until determine the streaming server of the child node that described service can be provided or judge that all child nodes are all unavailable;
When all child nodes of judgement are all unavailable, in the described receiving node streaming media server included at it, determine the streaming media server that described service can be provided;
If described receiving node be can not determine the streaming media server that described service can be provided,
In the situation that described child node is as current receiving node, described multimedia content on demand request is redirected to the father node of this child node, determine the streaming media server that described service can be provided in this father node streaming media server included at it, if this father node be can not determine the streaming media server that described service can be provided, be judged as in described service-domain and do not have the streaming media server that described service can be provided;
In the situation that, except above-mentioned situation, be judged as in described service-domain and do not have the streaming media server that described service can be provided;
If described receiving node is not the father node in described service-domain,
Determine the streaming media server that described service can be provided in the described receiving node streaming media server included at it;
If described receiving node be can not determine the streaming media server that described service can be provided, described multimedia content on demand request is redirected to the upper layer node of described receiving node;
Using described upper layer node as current receiving node, return to whether above-mentioned definite described receiving node is the step of father node.
4. method according to claim 3 wherein, describedly judges in described service-domain that the step of the streaming server that whether has the node that the service that described multimedia content on demand request asks can be provided also comprises:
Each nodes records is through multimedia content on demand request a period of time of this node;
When each node receives multimedia content on demand request, check and whether record the identical multimedia content on demand request from same node;
If record identical multimedia content on demand request, in this node streaming media server included at it, determine the streaming media server that described service can be provided;
If there is no identical multimedia content on demand request, carry out subsequent step.
5. according to the described method of claim 2 to 4 any one, wherein, described rank directional strategy comprises:
First order strategy, whether the node that it comprises the described first order strategy of inspection application and the position degree of closeness between described user, this node are whether load capacity movable and this node surpasses threshold value;
Second level strategy, it comprises inspection first order strategy and whether have asked content of multimedia in this node; And
Third level strategy, but it comprises the load capacity that checks the streaming media server in second level strategy and this node.
6. method according to claim 1, wherein, described multimedia content on demand request is received by the Centroid of described IPTV system or branch node or fringe node.
7. a re-positioning device that is redirected multimedia content on demand request in IPTV IPTV system, it is configured on the node of described IPTV system, and described re-positioning device comprises:
A plurality of access points, for the receiving multimedia content order request, wherein each access point is associated with multimedia content type, and content-targeted strategy corresponding to each multimedia content type;
Content type is determined device, for according to the access point number, determines the multimedia content type that described multimedia content on demand request is related; And
Redirection device, the content-targeted strategy for according to corresponding with determined multimedia content type, be redirected to suitable streaming media server by described multimedia content on demand request;
Wherein, described being redirected is multi-level being redirected, wherein, each node of described IPTV system is configured with rank directional strategy separately, described redirection device is configured to the rank directional strategy according to each node, whether decision node can be used for providing service to described multimedia content on demand request, when being judged as this node when available, described multimedia content on demand request is directed to this node, when being judged as this node when unavailable, described multimedia content on demand request is redirected to other node.
8. re-positioning device according to claim 7, wherein, described redirection device comprises:
The service-domain determination module, for the source address according to described multimedia content on demand request, be identified for the service-domain of described multimedia content on demand request;
Judge module, for the rank directional strategy based on all nodes in described service-domain, judge in described service-domain the streaming server that whether has the node that the service that described multimedia content on demand request asks can be provided;
Check module, for checking described service-domain, whether upper layer node is arranged;
Redirection module, for being redirected to described multimedia content on demand request described streaming server or described upper layer node;
Wherein, described redirection device also is configured to when service-domain does not have upper layer node, according to described content-targeted strategy, carries out other processing.
9. re-positioning device according to claim 8, wherein, described judge module comprises:
The quantity determining unit, for determining the quantity of all nodes in described service-domain;
Determining unit, for determining whether described node is father node in described service-domain;
The strategy execution unit, for the child node for described node in described service-domain, carry out the rank directional strategy of described child node;
Whether judging unit, can be used for providing described service for judging described child node;
The streaming media server determining unit, determine the streaming media server that described service can be provided for the streaming media server included at described node;
Wherein, described redirection module is also for being redirected to available child node by described multimedia content on demand request.
10. re-positioning device according to claim 9, wherein, described judge module also comprises:
Record cell, for recording the multimedia content on demand request a period of time through described node; And
Whether inspection unit, record the identical multimedia content on demand request from same node for checking.
11. the described re-positioning device of according to Claim 8 to 10 any one, wherein, described rank directional strategy comprises:
First order strategy, whether the node that it comprises the described first order strategy of inspection application and the position degree of closeness between the user, this node are whether load capacity movable and this node surpasses threshold value;
Second level strategy, it comprises inspection first order strategy and whether have asked content of multimedia in this node; And
Third level strategy, but it comprises the load capacity that checks the streaming media server in second level strategy and this node.
12. the server for IPTV (IPTV) system comprises: re-positioning device as described as claim 7 to 11 any one.
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| CN101141626A (en) * | 2007-10-19 | 2008-03-12 | 深圳华为通信技术有限公司 | Service starting method, device and system of network television, and network television terminal |
| CN101582919A (en) * | 2009-04-14 | 2009-11-18 | 冯俊秋 | Method and system for playing of Internet television |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101141626A (en) * | 2007-10-19 | 2008-03-12 | 深圳华为通信技术有限公司 | Service starting method, device and system of network television, and network television terminal |
| CN101582919A (en) * | 2009-04-14 | 2009-11-18 | 冯俊秋 | Method and system for playing of Internet television |
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